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Special Charges Special Charges (Tables) | 6 Months Ended
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Jun. 30, 2017
Restructuring and Related Activities [Abstract] |
Restructuring and Related Costs [Table Text Block] | A summary of termination benefit activity and related liabilities follows (in millions):
|  | Liability December 31, 2016 |  | Six Months Ended June 30, 2017 |  | Liability June 30, 2017 |
|  |  | Charges for Termination Benefits |  | Paid/ Settled |  |
Workforce reductions: |  |  |  |  |  |  |  |  |
Evolving business needs |  | $ | 0.1 |  |  | $ | 1.5 |  |  | $ | (0.4 | ) |  | $ | 1.2 |  |
Piketon demonstration facility |  | 5.4 |  |  | 0.1 |  |  | (0.5 | ) |  | 5.0 |  |
|  | $ | 5.5 |  |  | $ | 1.6 |  |  | $ | (0.9 | ) |  | $ | 6.2 |  |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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